NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

1 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, last 30 days — NPA 989
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 1
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 989-823 0XXX4XXX5XXX6XXX · 4 holders which blocks → MICHIGAN BELL TEL CO 9323 VASSAR MI
— 989-824 5XXX6XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MTPLEASANT MI
— 989-826 0XXX4XXX7XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC. - MI 0695 MIO MI
— 989-828 1XXX9XXX · 2 holders which blocks → FRONTIER NORTH, INC. - MI 0695 SHEPHERD MI
— 989-829 not yet reported which blocks → SPOK, INC. 6630 OWOSSO MI
— 989-830 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 SAGINAW MI
— 989-831 1XXX6XXX · 2 holders which blocks → FRONTIER NORTH, INC. - MI 0695 STANTON MI
— 989-832 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 MIDLAND MI
— 989-833 0XXX1XXX3XXX4XXX6XXX8XXX9XXX · 7 holders which blocks → FRONTIER NORTH, INC. - MI 0695 RIVERDALE MI
— 989-834 3XXX4XXX8XXX · 3 holders which blocks → FRONTIER NORTH, INC. - MI 0695 OVID MI
— 989-835 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 MIDLAND MI
— 989-836 1XXX3XXX4XXX6XXX8XXX · 4 holders which blocks → FRONTIER MIDSTATES, INC. - MI 0681 ALGER MI
— 989-837 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 MIDLAND MI
— 989-838 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRONTIER NORTH, INC. - MI 0695 POMPEII MI
— 989-839 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 MIDLAND MI
— 989-842 0XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → FRONTIER NORTH, INC. - MI 0695 BRECKENRDG MI
— 989-843 1XXX2XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → MICHIGAN BELL TEL CO 9323 MAYVILLE MI
— 989-845 0XXX8XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF CENTRAL MICHIGAN, INC 0671 CHESANING MI
— 989-846 none assigned yet which blocks → MICHIGAN BELL TEL CO 9323 STANDISH MI
— 989-847 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRONTIER NORTH, INC. - MI 0695 ASHLEY MI
— 989-848 0XXX1XXX3XXX4XXX6XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC. - MI 0695 FAIRVIEW MI
— 989-854 3XXX4XXX5XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MTPLEASANT MI
— 989-855 0XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → FRONTIER NORTH, INC. - MI 0695 MUIR MI
— 989-856 0XXX1XXX5XXX6XXX · 4 holders which blocks → FRONTIER NORTH, INC. - MI 0695 CASEVILLE MI
— 989-858 2XXX4XXX5XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GAYLORD MI
— 989-859 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MIDLAND MI
— 989-860 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 SAGINAW MI
— 989-862 2XXX6XXX8XXX · 2 holders which blocks → FRONTIER NORTH, INC. - MI 0695 ELSIE MI
— 989-863 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 REESE MI
— 989-864 0XXX1XXX2XXX4XXX6XXX9XXX · 5 holders which blocks → FRONTIER NORTH, INC. - MI 0695 MINDENCITY MI
— 989-865 0XXX1XXX2XXX3XXX4XXX5XXX7XXX · 4 holders which blocks → MICHIGAN BELL TEL CO 9323 ST CHARLES MI
— 989-866 3XXX4XXX7XXX · 3 holders which blocks → WINN TEL. CO. 0737 WINN MI
— 989-867 not yet reported which blocks → PIGEON TEL. CO. 0721 TWINING MI
— 989-868 0XXX1XXX2XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → MICHIGAN BELL TEL CO 9323 REESE MI
— 989-870 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 SAGINAW MI
— 989-871 1XXX8XXX · 2 holders which blocks → WOLVERINE TEL. CO. 0738 MILLINGTON MI
— 989-872 not yet reported which blocks → FRONTIER NORTH, INC. - MI 0695 CASS CITY MI
— 989-873 0XXX1XXX2XXX7XXX · 4 holders which blocks → FRONTIER MIDSTATES, INC. - MI 0681 PRESCOTT MI
— 989-874 3XXX8XXX · 2 holders which blocks → BRIGHTSPEED OF MICHIGAN, LLC 0702 KINDE MI
— 989-875 0XXX9XXX · 2 holders which blocks → FRONTIER NORTH, INC. - MI 0695 ITHACA MI
— 989-876 3XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF CENTRAL MICHIGAN, INC 0671 AU GRES MI
— 989-878 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FREELAND MI
— 989-879 0XXX9XXX which blocks → BRIGHTSPEED OF MICHIGAN, LLC 0702 PINCONNING MI
— 989-883 4XXX6XXX7XXX8XXX · 3 holders which blocks → MICHIGAN BELL TEL CO 9323 SEBEWAING MI
— 989-889 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRAYLING MI
— 989-890 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → MICHIGAN BELL TEL CO 9323 SAGINAW MI
— 989-891 6XXX7XXX which blocks → MICHIGAN BELL TEL CO 9323 BAY CITY MI
— 989-892 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 BAY CITY MI
— 989-893 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 BAY CITY MI
— 989-894 not yet reported which blocks → MICHIGAN BELL TEL CO 9323 BAY CITY MI

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.